package com.itheima.reggie.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.itheima.reggie.dao.CategoryMapper;
import com.itheima.reggie.entity.Category;
import com.itheima.reggie.entity.Dish;
import com.itheima.reggie.entity.Setmeal;
import com.itheima.reggie.service.ICategoryService;
import com.itheima.reggie.service.IDishService;
import com.itheima.reggie.service.ISetmealService;
import com.itheima.reggie.web.exception.CustomException;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

@Service
public class CategoryServiceImpl extends ServiceImpl<CategoryMapper, Category> implements ICategoryService {
    @Autowired
    private IDishService dishService;
    @Autowired
    private ISetmealService setmealService;

    @Override
    public void remove(Long id) {
        //添加查询条件，根据分类id进行查询菜品数据
        LambdaQueryWrapper<Setmeal> setmealWrapper = new LambdaQueryWrapper<>();
        setmealWrapper.eq(Setmeal::getCategoryId,id);
        int count1 = setmealService.count(setmealWrapper);

        if (count1>0){
            throw new CustomException("当前分类下关联了套餐，不能删除");
        }

        //添加查询条件，根据分类id进行查询菜品数据
        LambdaQueryWrapper<Dish> dishLambdaQueryWrapper = new LambdaQueryWrapper<>();
        dishLambdaQueryWrapper.eq(Dish::getCategoryId,id);
        int count2 = dishService.count(dishLambdaQueryWrapper);
        //如果已经关联，抛出一个业务异常
        if(count2 > 0){
            throw new CustomException("当前分类下关联了菜品，不能删除");//已经关联菜品，抛出一个业务异常
        }
        //正常删除分类
        super.removeById(id);

    }
}
